Empirical Model for Estimation of the Residual Strength of Liquefied Soil
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 141, Issue 9
Abstract
An empirical model for the estimation of residual strength is proposed. The proposed model predicts residual strength as a nonlinear function of both penetration resistance and initial effective stress. The model is consistent with steady-state concepts and behavior observed in laboratory tests, but was calibrated on the basis of residual strengths back-calculated from flow-side case histories. The back-calculated strengths considered inertial effects, hydroplaning, uncertainties, the conditions under which flow sides are known not to have occurred in past earthquakes, and the relative quality of each case history. The proposed model predicts residual strengths that are generally between those predicted by direct approaches and those predicted by normalized strength approaches. The proposed model also allows estimation of the probability distribution of residual strength.
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Acknowledgments
The research described in this paper was supported by the Washington State Department of Transportation and the Pacific Earthquake Engineering Research Center; the support of Tony Allen and Kim Willoughby is gratefully acknowledged. A portion of the work was completed while the senior writer was on sabbatical leave at the International Centre for Geohazards at the Norwegian Geotechnical Institute. The authors would also like to acknowledge the residual strength data made available by Dr. Scott Olson and the lateral spreading data made available to all researchers by Dr. T.L. Youd. The writers are also grateful to Ross Boulanger, Liam Finn, and Tom Shantz for their constructive comments on a draft of this paper.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 141 • Issue 9 • September 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Aug 9, 2014
Accepted: Feb 18, 2015
Published online: May 6, 2015
Published in print: Sep 1, 2015
Discussion open until: Oct 6, 2015
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